A bit of an abstract title but I’m basically taking about:
h4::after {
content: "";
}
If you have just text in the content property, you can adjust spacing with the letter-spacing and/or word-spacing properties in CSS. Letter-spacing would even work if you have just icons but I had a combination of three icons and a word, and the letter-spacing I wanted between the icons pulled the letters of the word too far apart. You can’t use html in the content property of a pseudo-element like ::before or :: after, so is out.
What: I found my solution on Stack Overflow, see link below, where someone had given a pretty list of the different spaces in CSS as a solution to a similar problem.